北师大版七年级数学下册整式的加减法计算题精选 560文档格式.docx
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7
(9x2+7xy-—x)+(8x2+9xy+8x)
8
63
(—xy+7y2-2)+(x2+—xy+7y2-5)
74
15
(xy+—y-—)-(xy+x-3)
74
(5y+5x-9z2)-(9y+5x+7z2)
(5k2+8k)-(3k2-6k-9)
(9a2-a+9b)-(7a2-a-8b)
x2-(5x2+9x+2)+(4x+5)
2y2-(2x2-y)+(7x2-4y2)
1
(7x2-7xy-—x)-(4x2+7xy+8x)
6
43
(—xy-4y2+9)+(x2-—xy+4y2-5)
34
11
(xy+—y-—)+(xy-x-2)
57
(3y+8x+2z2)+(5y+7x-6z2)
(9k2-5k)+(8k2+5k+4)
(5a2-3a+5b)+(8a2+9a+b)
5x2-(x2-2x+2)-(6x-8)
8y2-(3x2-y)+(x2-6y2)
(3x2+6xy+—x)+(x2-4xy-9x)
4
16
(—xy-2y2+2)-(x2+—xy-4y2+7)
55
(xy-—y-—)+(xy-x+2)
64
(y+8x+2z2)-(2y-6x-8z2)
(6k2-2k)-(6k2+3k-9)
(4a2+4a-8b)-(5a2-6a+4b)
8x2-(4x2+3x-8)-(6x+3)
9y2+(4x2-y)-(4x2+7y2)
(3x2+8xy-—x)-(3x2+8xy-9x)
17
(—xy-4y2+7)+(x2-—xy-3y2-9)
58
41
(xy-—y-—)-(xy-x-6)
(6y-6x+5z2)+(y+7x-3z2)
(6k2-2k)-(3k2+k+3)
(9a2-5a+4b)-(7a2+5a-7b)
x2+(x2+5x+5)-(8x+2)
9y2-(5x2+y)+(7x2-7y2)
(3x2-5xy-—x)-(2x2-3xy-4x)
14
(—xy+5y2-1)+(x2+—xy+9y2+8)
33
76
(xy-—y-—)-(xy-x+1)
65
(3y+6x+9z2)-(6y+5x-4z2)
(7k2+9k)-(4k2+9k-4)
(9a2+a+4b)-(2a2-8a-8b)
2x2-(3x2+7x-6)+(6x+8)
6y2-(4x2-y)-(x2-8y2)
(7x2+6xy-—x)+(6x2-8xy+7x)